How to regular expression search and highlight in PDF in C# and ByteScout Robotic Process Automation

ByteScout Robotic Process Automation: set of integrated APIs for quick replaccement of manual data processing with robotic process automations.

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Program.cs

      
using System.Diagnostics; using System.Drawing; using Bytescout.PDFExtractor; using Bytescout.PDF; using Pen = Bytescout.PDF.Pen; using SolidBrush = Bytescout.PDF.SolidBrush; namespace SearchAndHighlightExample { class Program { static void Main(string[] args) { const string inputFile = @"sample.pdf"; const int pageIndex = 0; const string searchPattern = "\\d+\\.\\d+"; // Prepare TextExtractor using (TextExtractor textExtractor = new TextExtractor("demo", "demo")) { textExtractor.RegexSearch = true; textExtractor.LoadDocumentFromFile(inputFile); // Load document with PDF SDK using (Document pdfDocument = new Document(inputFile)) { pdfDocument.RegistrationName = "demo"; pdfDocument.RegistrationKey = "demo"; Page pdfDocumentPage = pdfDocument.Pages[pageIndex]; Canvas canvas = pdfDocumentPage.Canvas; SolidBrush fillBrush = new SolidBrush(new ColorRGB(255, 0, 0)); fillBrush.Opacity = 50; // make the brush transparent // Search for pattern and highlight found pieces if (textExtractor.Find(pageIndex, searchPattern, caseSensitive: false)) { do { foreach (var foundPiece in textExtractor.FoundText.Elements) { // Inflate the rectangle a bit RectangleF rect = RectangleF.Inflate(foundPiece.Bounds, 1, 2); // Draw rectangle over the PDF page canvas.DrawRectangle(fillBrush, rect); } } while (textExtractor.FindNext()); } // Save as new PDF document pdfDocument.Save("result.pdf"); // Open result document in default associated application (for demo purposes) Process.Start("result.pdf"); } } } } }

SearchAndHighlightExample.csproj

      
<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" /> <PropertyGroup> <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration> <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform> <ProjectGuid>{8378FE44-D33E-4759-AF78-8BAF35E80587}</ProjectGuid> <OutputType>Exe</OutputType> <AppDesignerFolder>Properties</AppDesignerFolder> <RootNamespace>SearchAndHighlightExample</RootNamespace> <AssemblyName>SearchAndHighlightExample</AssemblyName> <TargetFrameworkVersion>v4.0</TargetFrameworkVersion> <FileAlignment>512</FileAlignment> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG;TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDF, Version=1.5.0.190, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>..\..\Program Files\Bytescout PDF SDK\net4.0\Bytescout.PDF.dll</HintPath> </Reference> <Reference Include="Bytescout.PDFExtractor, Version=8.5.0.2863, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> <HintPath>..\..\Program Files\Bytescout PDF Extractor SDK\net4.00\Bytescout.PDFExtractor.dll</HintPath> </Reference> <Reference Include="System" /> <Reference Include="System.Core" /> <Reference Include="System.Drawing" /> <Reference Include="System.Xml.Linq" /> <Reference Include="System.Data.DataSetExtensions" /> <Reference Include="System.Data" /> <Reference Include="System.Xml" /> </ItemGroup> <ItemGroup> <Compile Include="Program.cs" /> <Compile Include="Properties\AssemblyInfo.cs" /> </ItemGroup> <ItemGroup> <Content Include="sample.pdf"> <CopyToOutputDirectory>Always</CopyToOutputDirectory> </Content> </ItemGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> <!-- To modify your build process, add your task inside one of the targets below and uncomment it. Other similar extension points exist, see Microsoft.Common.targets. <Target Name="BeforeBuild"> </Target> <Target Name="AfterBuild"> </Target> --> </Project>

SearchAndHighlightExample.sln

      
Microsoft Visual Studio Solution File, Format Version 12.00 # Visual Studio 2013 VisualStudioVersion = 12.0.40629.0 MinimumVisualStudioVersion = 10.0.40219.1 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SearchAndHighlightExample", "SearchAndHighlightExample.csproj", "{8378FE44-D33E-4759-AF78-8BAF35E80587}" EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU Release|Any CPU = Release|Any CPU EndGlobalSection GlobalSection(ProjectConfigurationPlatforms) = postSolution {8378FE44-D33E-4759-AF78-8BAF35E80587}.Debug|Any CPU.ActiveCfg = Debug|Any CPU {8378FE44-D33E-4759-AF78-8BAF35E80587}.Debug|Any CPU.Build.0 = Debug|Any CPU {8378FE44-D33E-4759-AF78-8BAF35E80587}.Release|Any CPU.ActiveCfg = Release|Any CPU {8378FE44-D33E-4759-AF78-8BAF35E80587}.Release|Any CPU.Build.0 = Release|Any CPU EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE EndGlobalSection EndGlobal

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